From patchwork Fri Feb 19 06:09:47 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 8356401 Return-Path: X-Original-To: patchwork-linux-renesas-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E09489F372 for ; Fri, 19 Feb 2016 06:10:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 354DC203B5 for ; Fri, 19 Feb 2016 06:10:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 51B23203F7 for ; Fri, 19 Feb 2016 06:10:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1425574AbcBSGKG (ORCPT ); Fri, 19 Feb 2016 01:10:06 -0500 Received: from kirsty.vergenet.net ([202.4.237.240]:40530 "EHLO kirsty.vergenet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1425825AbcBSGKE (ORCPT ); Fri, 19 Feb 2016 01:10:04 -0500 Received: from reginn.isobedori.kobe.vergenet.net (p5023-ipbfp803kobeminato.hyogo.ocn.ne.jp [123.221.39.23]) by kirsty.vergenet.net (Postfix) with ESMTPA id 2406A25BE78; Fri, 19 Feb 2016 17:09:56 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=verge.net.au; s=mail; t=1455862196; bh=VB3X73fqXLYwlxWc+i5NwTSCtGzworTJgSMrQGlTTm8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cay2O03ESl6phUTgArEyDHiBNtDKtps9ym2EqCzwIeSbdROY/YOTfQuqzblSZg4/d ArhVtoz1uUzw+bfukVyojd0KKwDF5mFogqDfVF0jCyZQ8qlgW6ltsBneZIYl9z33zt bTUOPm+CRPP6zOrUxODv34qCcLa1l9ZdCAT+A2LQ= Received: by reginn.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id F38A0942E48; Fri, 19 Feb 2016 15:09:48 +0900 (JST) From: Simon Horman To: linux-renesas-soc@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Magnus Damm , Geert Uytterhoeven , Simon Horman Subject: [PATCH 4/4] ARM: shmobile: Remove shmobile_boot_arg Date: Fri, 19 Feb 2016 15:09:47 +0900 Message-Id: <901c5ffaaed117a38be9d0c29247c4888d6c8636.1455859965.git.horms+renesas@verge.net.au> X-Mailer: git-send-email 2.1.4 In-Reply-To: References: Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Geert Uytterhoeven CPU boot configuration writes to shmobile_boot_arg, which is located in the .text section, and thus should not be written to. As of commit 1d33a354bbb618ba ("ARM: shmobile: Per-CPU SMP boot / sleep code for SCU SoCs"), and ignoring accidental remainings, shmobile_boot_arg is always set to MPIDR_HWID_BITMASK by C code. Hence we can just hardcode this in the assembler code, and remove the variable, and thus also remove the need to write to this variable. Signed-off-by: Geert Uytterhoeven Acked-by: Nicolas Pitre Signed-off-by: Simon Horman --- arch/arm/mach-shmobile/common.h | 1 - arch/arm/mach-shmobile/headsmp.S | 8 ++------ arch/arm/mach-shmobile/platsmp-apmu.c | 1 - arch/arm/mach-shmobile/platsmp-scu.c | 1 - 4 files changed, 2 insertions(+), 9 deletions(-) diff --git a/arch/arm/mach-shmobile/common.h b/arch/arm/mach-shmobile/common.h index 9cb11215ceba..b3a4ed5289ec 100644 --- a/arch/arm/mach-shmobile/common.h +++ b/arch/arm/mach-shmobile/common.h @@ -4,7 +4,6 @@ extern void shmobile_init_delay(void); extern void shmobile_boot_vector(void); extern unsigned long shmobile_boot_fn; -extern unsigned long shmobile_boot_arg; extern unsigned long shmobile_boot_size; extern void shmobile_smp_boot(void); extern void shmobile_smp_sleep(void); diff --git a/arch/arm/mach-shmobile/headsmp.S b/arch/arm/mach-shmobile/headsmp.S index 94d86ed16414..32e0bf6e3ccb 100644 --- a/arch/arm/mach-shmobile/headsmp.S +++ b/arch/arm/mach-shmobile/headsmp.S @@ -24,7 +24,6 @@ .arm .align 12 ENTRY(shmobile_boot_vector) - ldr r0, 2f ldr r1, 1f bx r1 @@ -34,9 +33,6 @@ ENDPROC(shmobile_boot_vector) .globl shmobile_boot_fn shmobile_boot_fn: 1: .space 4 - .globl shmobile_boot_arg -shmobile_boot_arg: -2: .space 4 .globl shmobile_boot_size shmobile_boot_size: .long . - shmobile_boot_vector @@ -46,9 +42,9 @@ shmobile_boot_size: */ ENTRY(shmobile_smp_boot) - @ r0 = MPIDR_HWID_BITMASK mrc p15, 0, r1, c0, c0, 5 @ r1 = MPIDR - and r0, r1, r0 @ r0 = cpu_logical_map() value + and r0, r1, #0xffffff @ MPIDR_HWID_BITMASK + @ r0 = cpu_logical_map() value mov r1, #0 @ r1 = CPU index adr r2, 1f ldmia r2, {r5, r6, r7} diff --git a/arch/arm/mach-shmobile/platsmp-apmu.c b/arch/arm/mach-shmobile/platsmp-apmu.c index 911884f7e28b..aba75c89f9c1 100644 --- a/arch/arm/mach-shmobile/platsmp-apmu.c +++ b/arch/arm/mach-shmobile/platsmp-apmu.c @@ -123,7 +123,6 @@ void __init shmobile_smp_apmu_prepare_cpus(unsigned int max_cpus, { /* install boot code shared by all CPUs */ shmobile_boot_fn = virt_to_phys(shmobile_smp_boot); - shmobile_boot_arg = MPIDR_HWID_BITMASK; /* perform per-cpu setup */ apmu_parse_cfg(apmu_init_cpu, apmu_config, num); diff --git a/arch/arm/mach-shmobile/platsmp-scu.c b/arch/arm/mach-shmobile/platsmp-scu.c index f2198c9c7435..081a097c9219 100644 --- a/arch/arm/mach-shmobile/platsmp-scu.c +++ b/arch/arm/mach-shmobile/platsmp-scu.c @@ -44,7 +44,6 @@ void __init shmobile_smp_scu_prepare_cpus(unsigned int max_cpus) { /* install boot code shared by all CPUs */ shmobile_boot_fn = virt_to_phys(shmobile_smp_boot); - shmobile_boot_arg = MPIDR_HWID_BITMASK; /* enable SCU and cache coherency on booting CPU */ scu_enable(shmobile_scu_base);